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This paper reports the first experimental application of the recently reported quasi-exact inverse (QEI) for memory-polynomial or memory-spline models in the design of a digital predistorter (DPD) linearizing a power amplifier (PA). In comparison to indirect learning architecture, where the coefficients of the DPD are extracted by swapping the input and output variable in any PA model, the DPD extraction...
A current control method for the utility interactive inverter based on multi-rate deadbeat control method with FPGA based hardware controller is verified for 100kHz carrier PWM inverter. As the distributed power systems spread, the requirement of the control accuracy for the utility interactive inverter becomes more presice. As the carrier frequency of the PWM inverter gradually become higher range,...
In this paper we exploit FPGA flexibility in the context of accelerating the solution of many small systems of linear equations, a problem central to model predictive control (MPC). The main observation exploited by this work is the distinction between accuracy (meaning the degree of correctness of a final computational result) and precision (meaning the degree of correctness of each atomic computation)...
A new current control method for the utility interactive inverter based on multi-rate deadbeat control with FPGA based hardware controller is proposed. Multi-rate deadbeat control improves the tracking accuracy to the reference compared with the conventional single rate deadbeat control. As a result, superior characteristics were derived with very small LC filter component. Also to utilize the capability...
Digital signal processing (DSP) algorithms exhibit an increasing need for the efficient implementation of trigonometric functions, coordinate transformations or rotations of complex valued phasors. Popular application examples are algorithms used in digital communication technology and in adaptive signal processing. The trigonometric functions like cosine and sine form the building block of certain...
Synchro is a kind of angular measuring devices with high reliability widely used in avigation, spaceflight, military affairs and other fields. It aims to test positions, displacements and other angular information. CORDIC algorithm and its pipeline architecture were utilized by correcting the compensating factor based on FPGA. During the angular solution, we proposed a new method for angle mapping...
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